Method and device for wireless communication

Abstract

The present application provides a method and device for wireless communications, comprising receiving a first signaling; the first signaling is used to indicate that a main path of SRB1 (Signaling Radio Bearer 1) is associated with a first radio link; the SRB1 is respectively associated with the first radio link and the second radio link; after receiving the first signaling, detecting failure occurred in the first radio link; as a response to the behavior of detecting failure occurred in the first radio link, executing a first operation set, the first operation set being related to whether one of the first radio link and the second radio link is for a U2N (UE to Network) relay. Through the first signaling and the first message, the present application helps to optimize the network in improving the communication reliability and avoiding the communication interruption.

What is claimed is: 
     
         1 . A first node for wireless communications, comprising:
 a first receiver, receiving a first signaling via a first air interface, the first signaling comprising a first field, the first field being used to configure a first cell; the first signaling being used to indicate maintaining a first RRC (Radio Resource Control) connection, or releasing the first RRC connection; and   a first transmitter, as a response to receiving the first signaling, initiating a random access procedure for the first cell via a second air interface;   wherein the first field comprises a second field, and the second field is used to configure the random access procedure for the first cell; the first air interface is an air interface between the first node and a first relay, and the second air interface is an air interface between the first node and a radio access network where the first cell is located; the first RRC connection is a PC5-RRC connection between the first node and the first relay.   
     
     
         2 . The first node according to  claim 1 , wherein
 the first receiver, as a response to receiving the first signaling, releases the first RRC connection;   the first cell is an SpCell (Special Cell), the first field is SpCellConfig, and the second field is Reconfiguration WithSync, the first signaling is transmitted through SRB1 (Signaling Radio Bearer 1), the SRB1 is a radio bearer between the first node and an MCG (Master Cell Group), the SRB1 is associated with a first RLC (Radio Link Control) bearer, and the first RLC bearer is an RLC bearer between the first node and the first relay; the first node is connected to the first relay; the releasing the first RRC connection comprises releasing the first RLC bearer; the first signaling is used to indicate releasing the first RRC connection.   
     
     
         3 . The first node according to  claim 1 , wherein
 the first cell is an SpCell, the first field is SpCellConfig, and the second field is Reconfiguration WithSync, the first signaling is transmitted through SRB1, the SRB1 is a radio bearer between the first node and an MCG, the SRB1 is associated with a first RLC bearer, and the first RLC bearer is an RLC bearer between the first node and the first relay; the first node is connected to the first relay; the first signaling is used to indicate maintaining the first RRC connection.   
     
     
         4 . The first node according to  claim 1 , wherein
 whether the first signaling comprises a third field is used to indicate whether to maintain the first RRC connection or release the first RRC connection; when the first signaling comprises the third field, the first signaling is used to indicate maintaining the first RRC connection, and when the first signaling does not comprise the third field, the first signaling is used to indicate releasing the first RRC connection.   
     
     
         5 . The first node according to  claim 2 , wherein
 whether the first signaling comprises a third field is used to indicate whether to maintain the first RRC connection or release the first RRC connection; when the first signaling comprises the third field, the first signaling is used to indicate maintaining the first RRC connection, and when the first signaling does not comprise the third field, the first signaling is used to indicate releasing the first RRC connection.   
     
     
         6 . The first node according to  claim 3 , wherein
 whether the first signaling comprises a third field is used to indicate whether to maintain the first RRC connection or release the first RRC connection; when the first signaling comprises the third field, the first signaling is used to indicate maintaining the first RRC connection, and when the first signaling does not comprise the third field, the first signaling is used to indicate releasing the first RRC connection.   
     
     
         7 . The first node according to  claim 1 , wherein
 the first signaling comprises a fourth field, and the fourth field comprised in the first signaling explicitly indicates whether to release or maintain the first RRC connection.   
     
     
         8 . The first node according to  claim 1 , wherein
 the meaning of the first signaling being used to indicate maintaining a first RRC connection, or releasing the first RRC connection comprises: when the first signaling indicates that all RBs of the Uu interface are not associated with an RLC bearer between the first node and the first relay, the first signaling is used to indicate releasing the first RRC connection; when the first signaling does not indicate that all RBs of the Uu interface are not associated with an RLC bearer between the first node and the first relay, the first signaling is used to indicate maintaining the first RRC connection.   
     
     
         9 . The first node according to  claim 4 , wherein
 the meaning of the first signaling being used to indicate maintaining a first RRC connection, or releasing the first RRC connection comprises: when the first signaling indicates that all RBs of the Uu interface are not associated with an RLC bearer between the first node and the first relay, the first signaling is used to indicate releasing the first RRC connection; when the first signaling does not indicate that all RBs of the Uu interface are not associated with an RLC bearer between the first node and the first relay, the first signaling is used to indicate maintaining the first RRC connection.   
     
     
         10 . The first node according to  claim 5 , wherein
 the meaning of the first signaling being used to indicate maintaining a first RRC connection, or releasing the first RRC connection comprises: when the first signaling indicates that all RBs of the Uu interface are not associated with an RLC bearer between the first node and the first relay, the first signaling is used to indicate releasing the first RRC connection; when the first signaling does not indicate that all RBs of the Uu interface are not associated with an RLC bearer between the first node and the first relay, the first signaling is used to indicate maintaining the first RRC connection.   
     
     
         11 . The first node according to  claim 6 , wherein
 the meaning of the first signaling being used to indicate maintaining a first RRC connection, or releasing the first RRC connection comprises: when the first signaling indicates that all RBs of the Uu interface are not associated with an RLC bearer between the first node and the first relay, the first signaling is used to indicate releasing the first RRC connection; when the first signaling does not indicate that all RBs of the Uu interface are not associated with an RLC bearer between the first node and the first relay, the first signaling is used to indicate maintaining the first RRC connection.   
     
     
         12 . The first node according to  claim 1 , wherein
 the meaning of the first signaling being used to indicate maintaining a first RRC connection, or releasing the first RRC connection comprises: when the first signaling indicates releasing all RLC entities for the first relay associated with an RB of the Uu interface, the first signaling is used to indicate releasing the first RRC connection; when the first signaling does not indicate releasing all RLC entities for the first relay associated with an RB of the Uu interface, the first signaling is used to indicate maintaining the first RRC connection.   
     
     
         13 . The first node according to  claim 1 , wherein
 the meaning of the first signaling being used to indicate maintaining a first RRC connection, or releasing the first RRC connection comprises: when the first signaling indicates that SRB1 is only associated with an RLC entity of the Uu interface, the first signaling is used to indicate releasing the first RRC connection; when the first signaling does not indicate that SRB1 is only associated with an RLC entity of the Uu interface, the first signaling is used to indicate maintaining the first RRC connection.   
     
     
         14 . The first node according to  claim 1 , wherein
 the meaning of the first signaling being used to indicate maintaining a first RRC connection, or releasing the first RRC connection is: when the first signaling indicates that a destination relay of the first node is a node other than the first relay, the first signaling is used to indicate releasing the first RRC connection, when the first signaling does not indicate a destination relay of the first node or any other node other than the first relay as a destination relay, the first signaling is used to indicate maintaining the first RRC connection.   
     
     
         15 . The first node according to  claim 1 , comprising:
 the first transmitter, as a response to executing the first signaling, starting a first timer, as a response to an expiration of the first timer, transmitting a target message, the target message being either a first message or a second message, and whether the target message is the first message or the second message being related to whether the first signaling is used to indicate maintaining the first RRC connection or releasing the first RRC connection;   wherein the first message is used to request an RRC connection re-establishment, and the second message is used to report link establishment failure; a stopping condition of the first timer comprises: successfully completing a random access procedure for the first cell; the meaning of whether the target message is the first message or the second message is related to whether the first signaling is used to indicate maintaining or releasing the first RRC connection is: when the first signaling is used to indicate maintaining the first RRC connection, the target message is the second message; when the first signaling is not used to indicate maintaining the first RRC connection, the target message is the first message.   
     
     
         16 . The first node according to  claim 4 , comprising:
 the first transmitter, as a response to executing the first signaling, starting a first timer, as a response to an expiration of the first timer, transmitting a target message, the target message being either a first message or a second message, and whether the target message is the first message or the second message being related to whether the first signaling is used to indicate maintaining the first RRC connection or releasing the first RRC connection;   wherein the first message is used to request an RRC connection re-establishment, and the second message is used to report link establishment failure; a stopping condition of the first timer comprises: successfully completing a random access procedure for the first cell; the meaning of whether the target message is the first message or the second message is related to whether the first signaling is used to indicate maintaining or releasing the first RRC connection is: when the first signaling is used to indicate maintaining the first RRC connection, the target message is the second message; when the first signaling is not used to indicate maintaining the first RRC connection, the target message is the first message.   
     
     
         17 . A method in a first node for wireless communications, comprising:
 receiving a first signaling via a first air interface, the first signaling comprising a first field, the first field being used to configure a first cell; the first signaling being used to indicate maintaining a first RRC connection, or releasing the first RRC connection; and   as a response to receiving the first signaling, initiating a random access procedure for the first cell via a second air interface;   wherein the first field comprises a second field, and the second field is used to configure the random access procedure for the first cell; the first air interface is an air interface between the first node and a first relay, and the second air interface is an air interface between the first node and a radio access network where the first cell is located; the first RRC connection is a PC5-RRC connection between the first node and the first relay.   
     
     
         18 . The method in a first node according to  claim 17 , wherein
 whether the first signaling comprises a third field is used to indicate whether to maintain the first RRC connection or release the first RRC connection; when the first signaling comprises the third field, the first signaling is used to indicate maintaining the first RRC connection, and when the first signaling does not comprise the third field, the first signaling is used to indicate releasing the first RRC connection.   
     
     
         19 . The method in a first node according to  claim 17 , comprising:
 as a response to executing the first signaling, starting a first timer, as a response to an expiration of the first timer, transmitting a target message, the target message being either a first message or a second message, and whether the target message is the first message or the second message being related to whether the first signaling is used to indicate maintaining the first RRC connection or releasing the first RRC connection;   wherein the first message is used to request an RRC connection re-establishment, and the second message is used to report link establishment failure; a stopping condition of the first timer comprises: successfully completing a random access procedure for the first cell; the meaning of whether the target message is the first message or the second message is related to whether the first signaling is used to indicate maintaining or releasing the first RRC connection is: when the first signaling is used to indicate maintaining the first RRC connection, the target message is the second message; when the first signaling is not used to indicate maintaining the first RRC connection, the target message is the first message.   
     
     
         20 . The method in a first node according to  claim 17 , wherein
 the meaning of the first signaling being used to indicate maintaining a first RRC connection, or releasing the first RRC connection comprises: when the first signaling indicates that all RBs of the Uu interface are not associated with an RLC bearer between the first node and the first relay, the first signaling is used to indicate releasing the first RRC connection; when the first signaling does not indicate that all RBs of the Uu interface are not associated with an RLC bearer between the first node and the first relay, the first signaling is used to indicate maintaining the first RRC connection.